lithium diisopropyl amide 1) THF, 0 deg C, 2 h, 2) THF, 0 deg C, 2 h, then r.t. overnight; Yield given. Multistep reaction;

1: H2SO4, acetic anhydride / Ambient temperature 2: 5.5 g / 20percent NaOH / 40 h / Heating View Scheme